Well the engine could have heated up or been too lean like most everyone has suggested. Did you fell the spinner? Was it extremely hot to the touch. My T-28 quit on me and man was the engine hot. I know for a fact it needs more of the cowling cut to get more air over the head. As far as the take off finally. Congrats. I had a cub and got rid of it. I just could get that dang thing off of the ground. I am an avid user or the rudder and elevator and have never had more trouble trying to get a plane to take off that that stupid Cub. I hear the real ones are just as much a pain in the rear as the ones that we fly. Congrats again and happy flying.